Compatible with: Weed eater string for Ko-balt 124-03,compatible with 24-volt max string trimmer model# 1124B-03, 2024A-03 and item# 1504979 and 1137837 Longer Lines: Dual-line spool with a total of 16ft of line, long lasting spool for cutting grass and weeds. Pre-Cut: The dual-line spool is pre-wound with 0.080 diameter line to make replacing spool quick and easy. Sturdy and : Made of high quality ABS and nylon thread, Long lasting spool for cutting grass and weeds Easy To Install: Pre-wound Tool-less installment, easy of use, long lasting saves you time and energy Colour:Blue Material:ABS+nylon Package Contents: 6 x string trimmer spools Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.